Luth-ar UR-01-M16-A A1 Upper Receiver 223/5.56mm Aluminum Black Hardcoat Anodize Receiver for M16

Description

The Luth-AR A1 Upper Receiver is an AR upper receiver, 223.

On an AR-pattern rifle the upper receiver is not the firearm – the lower is. That is why an upper ships directly to you while a lower has to go through a dealer.

A complete upper carries the barrel, gas system, handguard and usually the bolt carrier and charging handle; a stripped upper is the receiver alone. Check which this is, and check that the bolt matches the chambering – bolt and barrel are a matched pair.

Configuration decides the legal result. Putting an upper with a barrel under 16 inches onto a rifle lower makes a short-barreled rifle. Federal registration is no longer enforced as of 9 October 2026, but several states still restrict or prohibit short-barreled rifles, so check your own law before assembling one. On a pistol lower it does not. If you are unsure what your lower is registered as, ask us first.

This is a part or accessory, not a firearm, and ships directly to your address.